Hello,
I am working on an out building. One of the things we were looking to do is to place a bathroom (Toilet/Sink), in the structure. This structure will not be heated at all during the winter. I will blow out the water line going to it.
I hired an architect to draw up the building. He did a good job with the overall design but one thing has me concerned.
The foundation perimeter will be dug down 42in (trench footer). This is what the structure will be sitting on and is below the frost line. Then we will have a thermal break around the footer and under the slab. Then the slab will be poured inside the footer.
I get that the structure (walls) will not be going anywhere since its below the frost line. But what about slab? If I have plumbing coming up from the slab will I ever get any heaving since the slab is not below the frost line. The slab will only be 4in thick with i think 4in of stone under it.
I am worried about the plumbing come in and if the slab goes up or goes down from frost heave. Would it not destroy the plumbing?
Any other tips so I can make sure the plumbing is done correctly?
Drawing is attached of how the foundation will be done.
Thanks!
I am working on an out building. One of the things we were looking to do is to place a bathroom (Toilet/Sink), in the structure. This structure will not be heated at all during the winter. I will blow out the water line going to it.
I hired an architect to draw up the building. He did a good job with the overall design but one thing has me concerned.
The foundation perimeter will be dug down 42in (trench footer). This is what the structure will be sitting on and is below the frost line. Then we will have a thermal break around the footer and under the slab. Then the slab will be poured inside the footer.
I get that the structure (walls) will not be going anywhere since its below the frost line. But what about slab? If I have plumbing coming up from the slab will I ever get any heaving since the slab is not below the frost line. The slab will only be 4in thick with i think 4in of stone under it.
I am worried about the plumbing come in and if the slab goes up or goes down from frost heave. Would it not destroy the plumbing?
Any other tips so I can make sure the plumbing is done correctly?
Drawing is attached of how the foundation will be done.
Thanks!